Indigirite Mineral Data

General Indigirite Information

Chemical Formula:

Mg2Al2(CO3)4(OH)2•15(H2O)

Composition:

Molecular Weight = 646.85 gm

Magnesium 7.51 % Mg 12.46 % MgO

Aluminum 8.34 % Al 15.76 % Al₂O₃

Hydrogen 4.99 % H 44.56 % H₂O

Carbon 7.43 % C 27.21 % CO₂

Oxygen 71.73 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₂Al₂(CO₃)₄(OH)₂•15(H₂O)

Environment:

Alteration zone.

IMA Status:

Approved IMA 1971

Locality:

Sarylakh Au-Sb deposit, Indigirka River, northeastern Yakutia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Indigirite + Pronunciation

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Indigirite Crystallography

Crystal System:

MonoclinicSpace Group: Unk.

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.8(1), 5.24(0.9), 7.62(0.9),

Physical Properties of Indigirite

Color:

Snow white.

Density:

1.6

Diaphaneity:

Translucent

Fracture:

Flexible - Flexible fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

2 - Gypsum

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Indigirite

Gladstone-Dale:

CI meas= -0.142 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.3044,KC= 0.2665
Ncalc = 1.43

Optical Data:

Uniaxial (+), w=1.472, e=1.502, bire=0.0300.

Calculated Properties of Indigirite

Electron Density:

Bulk Density (Electron Density)=1.67 gm/cc
note: Specific Gravity of Indigirite =1.60 gm/cc.

Fermion Index:

Fermion Index = 0.0086836223
Boson Index = 0.9913163777

Photoelectric:

PE_Indigirite= 0.65 barns/electron
U=PE_Indigirite x rElectron Density= 1.09 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Indigirite is Not Radioactive

Indigirite Classification

Dana Class:

16b.01.03.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.01)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1

(16b.01.03)Dana Group

16b.01.03.01 Indigirite Mg2Al2(CO3)4(OH)2•15(H2O) Unk. Mono

Strunz Class:

05.DA.65 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DA -With medium-sized cations

05.DA.65 Indigirite Mg2Al2(CO3)4(OH)2•15(H2O) Unk. Mono

Other Indigirite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Indigirite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Indigirite Specimen Label here :

Indigirite

Mg2Al2(CO3)4(OH)2•15(H2O)
Dana No: 16b.01.03.01 Strunz No: 05.DA.65
Locality:

Notes: